Sound-propagating apparatus



J. E. JENKNS SOUND PROPAGATING APPARATUS Dec. 15, 1925- Filed Oct. 29. 1924 Patented Dec. 15, 1925.

UNITED STATES PATENT OFFICE.

JOHN ELLIOTT JENKINS, OF CHICAGO, ILLI NOIS, ASSIGNOR. BY MESNE ASSIGN- MENTS, OF ONE-HALF TO ZENITH RADIO CORPORATION, A CRPORATION OF ILLI- NOIS.

SOUND-PROPAGATING APPARATIS.

application filed October 29, 1924. Serial No. '746,493.

To all whom, it may co ncem:

p Be it known that I, JOHN ELLIOTT JEN- KINS, a citizen of the United States, residing at Chicago, in the county ot' Cook and 6 the State of Illinois, have invented a cer tain new and useful Improvenent iu Sound- Propagating Apparatus, of which the followng is a full, clear, concise, and exact descri tion.

y invention relates to sound ropagating apparatus employing a telephonic transnitter included in a, telephonic circuit, the invention being of particular use in 'broadeasting, in which event the telephonic circuit is suitably'connected with the broadcasting equipment to impress telephonic cur- 4 rent thereon.

By neans of my inveution, the sound propagated by way ot a transn'ittemay be modulated simultaneously with the modulation of the sound enanatiug from the sound 'producing instrument.

In one embodiment of the invention, the

transmtter is located in the sound chamber of an organ, this chanber having a swell panel for modulating the intensity ol the sound issuing from the organ as a whole,

the transmitter being located within a eontainer located within'the sound chanber and having athrottler to causea similar modulatiou of the sound entel-ing the container from the sound chanber. The swell panel is coupled with -the modul-ato]- supplied to said container whereby the swell panel operates the modulator supplied -to said .container to cause sinilar-:ml sinullaneous modulations of the sounds issuig l'rom the sound chanber to the exterioo'l" theni-gan and to the interior of the c'ontainer.

The invention is not to be limited to any particular embodinent, as it is inclu'sive of a nodulator for the sound emanating from any suitable sound producing means and a nodulator for the sound propagated by way of atransnitter and governed by the first modulator.

The invention will be more fully explained in connection with the aceompanying drawing in which Fig. 1 is a View, sonewhat diagrammatic, illustratingthe sound chanber of an organ with organ pipes in communication therewith and one form of equipment of ny invention 'within said chanber; F ig. 2 is a sectional elevation ot' the container for the transnitter with the transmitter shown in side elevation; F ig. 3 is a front View of the transmtter container with parts thereof broken away and with nechanism for controlling a throttler with which the cont-ansmitter is supported upon a standard 4 mouuted upon the bottom of a container This container is preferably of wedge shape, sound passages (i and 7 being formed in the converging sides thereot', the sound passages being provided with Valves or sound throttlers 8 and 9 which are hinged at. 10 upon the top of the eontainer. The eontainer may be formed of wood or other suitable material and is lined with fe1t or other sound-deadening material, as are also the throttlers, as indicated at 11, to prevent the Creation of side tones or echo effects that would otherwise be due to the container. Access of sound to the hinged portions of the tlrottlers` is also preventcd by a slack webhing of felt 12. Thethrottlers or valves 8 and 9 are coupled by the connected links 13 that constitute a. toggle connection between said valves for the purpose of efl'eetng their simultaneos o ta-nation, these toggle links being simultaneously and equally. operable by an uctuating rod 14 connected with the links at their junctie' point and confined to rectilinealtravel by means' of the slide bearings 15. The valres S and 9 na he valiln-ated by adjustably counectiug the uppe' ends of the links therewith. To this end, the upper ends ol' the links may be pivotally connected with sleeves l'G that are slidable upon the rods 17 carried by the valves, the

rods 17 being fixed by means of set screws 18.

The `diagrammatically illustrated sound chanber 19 of the organ encloses the con taiuer. This sound chanber has a throttler or modulator 20' conmonly called a swell panel which regulates the intensity of the' sound passing fromthe organ pipes 21' through the' sound chanber to the exterior otthe organ, said pipes may open into this chanber for the purpose. By locating the transmitter within the sound chanber, it is removed froni the influence of the other sounds upon the exterior ot' the organ while ,intended positions of these sleeves upon said at the same time the sounds passing thereto from the organ are, by means of my invention, modulated similarly to the modulat-ion efl'ected by the swell panel 20. To this end, the modulators 8 and 9 are operated simultaneously with and by the modulatoi' 20. The means through which the modulator 20 operates the modulators 8 and 9 similarly thereto and simultaneously therewith resides in a shaft 21 adjustably coupled with the modulator 20 similarly to the couplings between the 'links 13 and the modulators 8 and 9. This shaft is telescopically received within a sleeve 22 jou'naled upon the uppc' and adjustable end of the bracket 23. The shaft has a fiexible continuation 24'housed within a fieXible tube 25, this fiexible continuation of said shaft bein connected with a rigid continuation 26 w ich is coupled with the lower end of the rod 14:.

`/V hile I have illustrated valves or threttlers 8, 9 and 20 as one means for modulating the sounds emanating from the sound producer, I do not wish to be limited to any particular form of modulators which may be employed. The container acts as a receive' of sounds from the sound chamber and while the transmitter is preferably disposed within such receiver in order that it may be subject to the sounds received therein, the invention is not to be thus limited.

Changes may be made without departing from my invention.

Having thus described my invention, claim 1. A telephonic transmitte` included in a telephonic circuit in combination with a con tainer enclosing it fol-med with converging sides each having a sound passage and valves for said passages coupled to have simultaneous opening and simultaneous closing movements.

2. A telephonic transmitter in combination with a container enclo'sing it having a plurality of sound passages and valves for said passages coupled to have simultaneous opening and' simultaneous closing movements.

3. In a sound propagating system, the

combination with a telephonic transmitter included in a telephonic circuit; of sound gproducing means to the sound from which the transmitter is subject; a modulator for the sound emanating from said means; and a modulator for the sound passing' to the transmitter and governed by the first modulator.

4. In a sound propagating system, the combination with a telephonic t'ansmitter included in a telephonic circuit; of sound producing means to' the sound'from* which the tpansmitter is subject; 'an adjustable throttler'for the sound emanating from said means; and an adjustable th'ottler for the sound passing to the transmitter and governed by the first t hrottle'r.

5. In a sound propagating system, the combination with a telephonic transmitte` included in a telephonic circuit; of sound producing means to the sound from which the transmitter is subject; a modulator for' the sound emanating from said means; and a modulator for the sound propa-gated by way of the transmitter and governed by the first modulator. A I

6. In a sound p'ropagating system, the combination with a sound producng means; of a sound chamber 'ecciving sound from said means and imparting it to the exterior of the chamber; a modulator for the sound passing from the chambr to its exterior; a telephonic transmitter in a telephonic circuit; a container enclosing the transmitter and enclosed by said chamber from which the container receivessounds; and amodulator for the sound passing to the container and governed by the first modulator. V

7. In a sound propag'ating system, the combination with a sound. producng means; of a sound chamber receiving sound from said means and imparting it to the exterior of the chamber; a throttler for the sound passing from the chambe` to its exterior; a telephonic transmitter in a telephonic circuit; a container enclosing the transmitter and enclosed by said chamber from which the contain er receives sounds; and a thi-ottler for the sound passing to the container and governed by the first throttler.

8. In a sound propagatng system, the,

combination with a sound producing means; of a sound chamber receiving' sound from said means and imparting it to the exterior of the chamber; a modulator for the sound passing from the chamber to its exterior; a telephonic transnitter ina telephonic circuit; a sound receiver for conveying' sound to the tran'smitter and enclosed by said chamber from which said receiver receives sounds; and a modulator for the sound passing to the receivcr and governed by the first modulator.

9. In a sound' propagating system, the combination with a sound producing means;

i throttler.

10. In a sound propagating system, the combination with a sound producing means; of a sound chamberreceiving sound from 'of a sound chamber .receiving sound from said means and imparting it to the exterior of the chambe'; a modulator for the sound passing from the chamber to its exteror; a telephonic t'ansmitter in a telephonic circuit; a sound receiver for conveying sound to the transmitter and receiving sounds from said ohamber; and a modulator for the sound passing to the receiver and governed by the first modulator.

11. In a sound propagating system, the combination with-a sound produeing means; of a sound chamber receiving sound from said means and imparting it to the exterior of the chamben; a throttler for the sound passing from the chamber to its exterior; a telephonie transmitter in a telephonic circuit;'a sound receiver for conveying sound to the transmitter and receiving sounds from said chamber; and a throttler for the sound passing to the receiver and governed by the 20 first throttler.

In witness whereof, I hereunto subscribe myname.

JOHN ELLIOTT J ENKINS. 

